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Exploring the effect of F versus H on the selectivity of the transformation. [a] Enantiomeric ratio (e.r.) determined by chiral GC analysis. [b] Enantiomeric ratio could not be directly determined by GC or HPLC. Diastereomeric ratio (d.r.) determined by converting the alcohol to the Mosher ester and subsequent 19F NMR analysis (see Supporting Information).
